1. Vlingo. Since real estate agents do a lot of driving, using your voice -- instead of your fingers -- to search the Web, compose an e-mail, text message or take notes is useful (and safer).
Vlingo lets you do this with your voice. You can even send tweets to Twitter and update your Facebook. Oh yeah, use Vlingo to call anyone in your phone book. Simply press a button and talk. Vlingo does the rest. My favorite.